<?php


/**
 * Pw_task_cache的dao.
 *
 * @author Shi Long <long.shi@alibaba-inc.com>
 * @copyright ©2003-2103 phpwind.com
 * @license http://www.windframework.com
 *
 * @version $Id: PwTaskCacheDao.php 7210 2012-03-31 02:27:34Z long.shi $
 */
class PwTaskCacheDao extends PwBaseDao
{
    protected $_table = 'task_cache';
    protected $_dataStruct = array('uid', 'task_ids');

    /**
     * 添加一条缓存记录.
     *
     * @param array $data
     *
     * @return bool
     */
    public function update($data)
    {
        if (!$data = $this->_filterStruct($data)) {
            return false;
        }
        $sql = $this->_bindSql('REPLACE INTO %s SET %s', $this->getTable(), $this->sqlSingle($data));

        return $this->getConnection()->execute($sql);
    }

    /**
     * 根据uid获取缓存记录.
     *
     * @param int $uid
     *
     * @return array
     */
    public function get($uid)
    {
        $sql = $this->_bindTable('SELECT `task_ids` FROM %s WHERE `uid` = ?');

        return $this->getConnection()->createStatement($sql)->getValue(array($uid));
    }
}
